EFFECT OF ASPECT RATIO AND ARRANGEMENT OF SURFACE-MOUNTED CIRCULAR CYLINDERS ON HEAT TRANSFER CHARACTERISTICS

被引：8

作者：

Naik, Hemant ^{[1
]}

Tiwari, Shaligram ^{[1
]}

机构：

[1] Indian Inst Technol Madras, Dept Mech Engn, Madras 600036, Tamil Nadu, India

来源：

JOURNAL OF ENHANCED HEAT TRANSFER | 2018年 / 25卷 / 4-5期

关键词：

heat transfer enhancement; surface-mounted circular cylinders; inline arrangement; staggered arrangement; perimeter-averaged Nusselt number; height-averaged Nusselt number; thermal performance factor; PIN-FIN ARRAYS; FLUID-FLOW; TRANSFER COEFFICIENTS; STAGGERED ARRAYS; HORIZONTAL PLATE; BOUNDARY-LAYER; BASE SURFACE; FLAT-PLATE; CROSS-FLOW; VORTEX;

D O I：

10.1615/JEnhHeatTransf.2018024503

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The flow and heat transfer characteristics over three rows of circular cylinders mounted on a flat plate have been studied numerically using the commercial software ANSYS Fluent version 15.0. The present three-dimensional investigations aim to determine the effect of the aspect ratio of surface-mounted circular cylinders on heat transfer enhancement and fluid flow characteristics. Both inline and staggered arrangements of cylinders have been considered for Reynolds numbers ranging from 1000 to 4000. The flow field and heat transfer characteristics are studied using streamline plots and temperature contours in various planes. Enhancement in heat transfer is quantified in terms of span-averaged and overall Nusselt number (Nu). Variations in the perimeter-averaged Nu along the height of a cylinder and of height-averaged Nu around the cylinders are presented. The combined effects of heat transfer and pressure drop are expressed in terms of the thermal performance factor (JF) and are evaluated for different cylinder heights and inflow velocities.

引用

页码：443 / 463

页数：21

共 21 条

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